I got mine for an absolute steal years ago, brand new, so price isn't the issue.
Interesting you mention the Invidia, I was looking at it a few days ago and just yesterday I've started looking at the Injen one which seems even quieter, and I'd love to do the 'Quad' tips style like in this clip:
https://www.youtube.com/watch?v=7I5LvlwwVsE
Whatever I end up with, absolutely refuse to have any hiss or rasp... one of the big reasons I went Motordyne initially.